How to deploy Rails 2.3.2 app with Capistrano from the top (for FastCGI)?
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22-08-2019 - |
Question
Disclaimer: i am a noob to Rails and Capistrano (but an intermediate .NET C# developer) trying to learn more.
i have been have the toughest time getting a Capistrano development process set-up. here's what i have so far for my deploy.rb:
set :application, "MyAppName"
set :domain, "domainname"
set :user, "userid"
set :repository, "svn+ssh://#{user}@#{domain}/home/#{user}/svn/#{application}/trunk"
set :rails_env, :production
set :chmod755, %w(app config db lib public vendor script tmp public/dispatch.cgi public/dispatch.fcgi public/dispatch.rb)
set :deploy_to, "/home/#{user}/apps/#{application}"
set :use_sudo, false
set :deploy_via, :checkout
set :group_writable, false
default_run_options[:pty] = true
role :app, domain
role :web, domain
role :db, domain, :primary => true
here's my Capfile:
load 'deploy' if respond_to?(:namespace) # cap2 differentiator
Dir['vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }
load 'config/deploy'
namespace :deploy do
task :restart, :roles => :app do
run "#{current_path}/script/process/reaper --dispatcher=dispatch.fcgi"
end
desc "Set the proper permissions for directories and files on HostingRails accounts"
task :after_deploy do
run(chmod755.collect do |item|
"chmod 755 #{current_path}/#{item}"
end.join(" && "))
end
end
- Rails 2.3.2 doesn't have the script/process directory so the restart task doesn't work at all. How do I fix this?
- Is there a way to set the RAILS_ENV variable in environment.rb to "production" when the application is deployed ("set :rails_env, :production" does not do it)?
- Also, am I missing anything else from these 2 files?
Solution
Here's my deploy.rb, which hasn't really been updated in a long time. I run two sed commands to set the environment inside my :after_update_code task. I'm certain there's an easier way to do it, but this is my current method.
require 'erb'
before "deploy:setup", :db
after "deploy:update_code", "db:symlink"
after "deploy", "deploy:cleanup"
def prompt_with_default(var, default)
set(var) do
Capistrano::CLI.ui.ask "Enter #{var} [#{default}] : "
end
set var, default if eval("#{var.to_s}.empty?")
end
default_run_options[:pty] = true
set :rake, "/usr/local/bin/rake"
set :user, "your username"
set :application, "application name"
set :repository, "svn repository path"
set :host, "domain name"
set :db_host, "DB host name"
set :db_user, "DB user name"
set :db_prefix, "any DB name prefix your host might require"
set :rails_env, "production"
set :deploy_to, "/home/username/rails/#{host}" # your deployment directory
role :app, host
role :web, host
role :db, host, :primary => true
set :use_sudo, false
set :checkout, "export"
#
# TASKS
#
desc "Tasks to execute after code update"
task :after_update_code, :roles => [:app, :db, :web] do
# Make sure we're running in production
run "sed -i -e '/ENV.*RAILS_ENV/s/# //' #{release_path}/config/environment.rb"
run "sed -i -e '/ENV.*RAILS_ENV/s/production/#{rails_env}/' #{release_path}/config/environment.rb"
# Add banned IPs
deny_lines = []
File.readlines("#{release_path}/config/banned_ips").each {|ip|
deny_lines << "deny from #{ip}"
}
ip_ban_block = <<EOBAN
# Bannination
order allow,deny
#{deny_lines.join}
allow from all
EOBAN
run "sed -i -e 's/# BANNED IPS/#{ip_ban_block}/' #{release_path}/public/.htaccess"
run "chmod +x #{release_path}/script/runner"
run "chmod +x #{release_path}/script/process/reaper"
run "chmod +x #{release_path}/script/process/spawner"
run "chmod 755 #{release_path}/public/dispatch.*"
end
desc "Restarting after deployment"
task :after_deploy, :roles => [:app, :db, :web] do
run "cd #{current_path} && rake RAILS_ENV=production db:sessions:clear tmp:clear"
# fix permissions
run "dos2unix #{release_path}/public/dispatch.*"
run "dos2unix #{release_path}/public/.htaccess"
run "chmod -R 755 #{release_path}"
run "chmod -R 775 #{release_path}/log #{release_path}/tmp #{release_path}/script"
run "find #{release_path}/ | xargs touch"
run "touch #{deploy_to}/current/public/dispatch.fcgi"
end
desc "Restarting after rollback"
task :after_rollback, :roles => [:app, :db, :web] do
run "touch #{deploy_to}/current/public/dispatch.fcgi"
end
namespace :db do
desc "Create database yaml in shared path"
task :default do
prompt_with_default(:db_password, "")
db_config = ERB.new <<-EOF
base: &base
adapter: mysql
port: 3306
host: #{db_host}
username: #{db_user}
password: #{db_password}
development:
database: #{db_prefix}#{application}development
<<: *base
test:
database: #{db_prefix}#{application}test
<<: *base
production:
database: #{db_prefix}#{application}production
<<: *base
EOF
run "mkdir -p #{shared_path}/config"
put db_config.result, "#{shared_path}/config/database.yml"
end
desc "Make symlink for database yaml"
task :symlink do
run "ln -nfs #{shared_path}/config/database.yml #{release_path}/config/database.yml"
end
end
Once I set up my variables, I have a bash script that runs:
svn export $svn_path . --force
cap deploy
That'll ask me for my password twice. Once for exporting from SVN, and once as a prompt to automatically generate my database.yml in the shared path.
OTHER TIPS
Updated my answer, see #3...
I don't use FastCGI for deployment, but a few things that come to mind:
- The process scripts have been moved out of Rails core and into a plugin, which you can grab from GitHub.
Looking at my deploy.rb file, you'll likely need to pass the RAILS_ENV environment variable into the script through the command line, similar to:
run #{current_path}/script/process/reaper RAILS_ENV=#{rails_env} --dispatcher=dispatch.fcgi
- EDIT: Actually, it is slightly odd to have your tasks in the Capfile instead of deploy.rb - although looking at this thread on the Capistrano Google Group, it's not completely frowned upon. Up to you/your team, I suppose.
Hope this points you in the right direction.